The golden age of toy development was at the turn of the 20th century. Real wages were rising steadily in the Western world, allowing even working-class families to afford toys for their children, and industrial techniques of precision engineering and mass production was able to provide the supply to meet this rising demand. Intellectual emphasis was also increasingly being placed on the importance of a wholesome and happy childhood for the future development of children. William Harbutt, an English painter, invented plasticine in 1897, and in 1900 commercial production of the material as a children's toy began. Frank Hornby was a visionary in toy development and manufacture and was responsible for the invention and production of three of the most popular lines of toys based on engineering principles in the twentieth century: Meccano, Hornby Model Railways and Dinky Toys.
Meccano was a model construction system that consisted of re-usable metal strips, plates, angle girders, wheels, axles and gears, with nuts and bolts to connect the pieces and enabled the building of working models and mechanical devices. Dinky Toys pioneered the manufacture of die-cast toys with the production of toy cars, trains and ships and model train sets became popular in the 1920s. The Britain's company revolutionized the production of toy soldiers with the invention of the process of hollow casting in lead in 1893– the company's products remained the industry standard for many years.
Puzzles became greatly fashionable as well. In 1893, the English lawyer Angelo John Lewis, writing under the pseudonym of Professor Hoffman, wrote a book called Puzzles Old and New.
It contained, amongst other things, more than 40 descriptions of puzzles with secret opening mechanisms. This book grew into a reference work for puzzle games and was very popular at the time. The Tangram puzzle, originally from China, spread to Europe and America in the 19th century.